SN4 ""

No	Pattern	Freq
1	have [been] [verb] to be	621
2	have [been] [vb pp] to be	612
3	have [been] show to be	176
4	have [been] shown to be	176
5	have [been] find to be	143
6	have [been] found to be	143
7	have [been] [adj] to be	46
8	have [been] [adj] to be	46
9	have [been] hold to be	28
10	have [been] held to be	28
11	have [been] reported to be	23
12	have [been] report to be	23
13	have [been] prove to be	19
14	have [been] designed to be	16
15	have [been] design to be	16
16	have [been] proved to be	14
17	have [been] considered to be	12
18	have [been] consider to be	12
19	have [been] expect to be	12
20	have [been] said to be	12
21	have [been] say to be	12
22	have [been] assume to be	11
23	have [been] assumed to be	11
24	have [been] expected to be	11
25	have [been] think to be	10
26	have [been] thought to be	10
27	have [been] know to be	9
28	have [been] known to be	9
29	have [been] [v-ing] to be	8
30	have [been] seen to be	7